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in subjects: "Seismic Events"  
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PREDICTION OF SURFACE SETTLEMENT DUE TO THE DISPLACEMENT OF SOFT ZONES

Description: In areas composed of coastal plain sediments, soft zones subjected to partial overburden may be present in the subsurface. During or after a seismic event, these soft zones may be compressed. The resulting displacement due to the deformation of the soft zones will propagate to the ground surface and cause the surface to settle. This paper presents a method to predict the settlement at the surface due to the propagation of the displacement from the soft zones. This method is performed by discret… more
Date: March 3, 2008
Creator: Li, W
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Files used to generate figures and tables in the application of the SSMRP methodology to the seismic risk at the Zion Nuclear Power Plant

Description: The Seismic Safety Margins Research Program (SSMRP) was a program conducted to develop a complete, fully coupled analysis procedure (including methods and computer codes) for estimating the risk of an earthquake induced radioactive release from a commercial nuclear power plant. The analysis procedure was based on a state-of-the-art evaluation of then current seismic analysis and design processes, and it explicitly attempted to account for some of the uncertainties inherent in such processes. Th… more
Date: December 3, 1984
Creator: George, L.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Seismic criteria studies and analyses. Quarterly progress report No. 3. [LMFBR]

Description: Information is presented concerning the extent to which vibratory motions at the subsurface foundation level might differ from motions at the ground surface and the effects of the various subsurface materials on the overall Clinch River Breeder Reactor site response; seismic analyses of LMFBR type reactors to establish analytical procedures for predicting structure stresses and deformations; and aspects of the current technology regarding the representation of energy losses in nuclear power pla… more
Date: January 3, 1975
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Preliminary Catalog of Earthquakes in Northern Imperial Valley, California, January 1, 1977--March 31, 1977

Description: Seismic monitoring of the northern section of the Imperial Valley region in Southern California has been underway since 1973, in order to study in detail the relationship between geothermal areas and earthquakes. A description of the 22-station network and a list of preliminary data on earthquakes recorded by the network from January 1977 through March 1977 are presented.
Date: August 3, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Cluster Analysis for CTBT Seismic Event Monitoring

Description: Mines at regional distances are expected to be continuing sources of small, ambiguous events which must be correctly identified as part of the Comprehensive Nuclear-Test-Ban Treaty (CTBT) monitoring process. Many of these events are small enough that they are only seen by one or two stations, so locating them by traditional methods maybe impossible or at best leads to poorly resolved parameters. To further complicate matters, these events have parametric characteristics (explosive sources, shal… more
Date: August 3, 1999
Creator: Carr, Dorthe B.; Young, Chris J.; Aster, Richard C. & Zhang, Xioabing
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Surface-wave generation by underground nuclear explosions releasing tectonic strain

Description: Seismic surface-wave generation by underground nuclear explosions releasing tectonic strain is studied through a series of synthetic radiation-pattern calculations based on the earthquake-trigger model. From amplitude and phase radiation patterns for 20-s Rayleigh waves, inferences are made about effects on surface-wave magnitude, M/sub s/, and waveform character. The focus of this study is a comparison between two mechanisms of tectonic strain release: strike-slip motion on vertical faults and… more
Date: November 3, 1980
Creator: Patton, H. J.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Regional Seismic Travel-Time Prediction, Uncertainty, and Location Improvement in Western Eurasia

Description: We investigate our ability to improve regional travel-time prediction and seismic event location using an a priori three-dimensional velocity model of Western Eurasia and North Africa: WENA1.0 [Pasyanos et al., 2004]. Our objective is to improve the accuracy of seismic location estimates and calculate representative location uncertainty estimates. As we focus on the geographic region of Western Eurasia, the Middle East, and North Africa, we develop, test, and validate 3D model-based travel-time… more
Date: September 3, 2004
Creator: Flanagan, M P & Myers, S C
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Relocation of Gulf of Aqaba earthquakes using the JSOP Bulletin

Description: Ground truth information (i.e. precise information about the hypocenter and origin time of aseismic event) is difficult to obtain in the Middle East and North Africa region. One source of ground truth we are attempting to exploit is data from local seismic networks. An electronic bulletin from the second phase of the Joint Seismic Observation Period (JSOP), with participating countries in the eastern Mediterranean region, provides a source of local network data not ordinarily available. I have … more
Date: July 3, 1997
Creator: Sweeney, J. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Preliminary Definition of Geophysical Regions in Western Eurasia

Description: The authors present a regionalized crustal model of Western Eurasia, WEA. The model is constructed using results from published studies and maps of geological and geophysical parameters in this region, and was developed in conjunction with the updated regionalization of Middle East and North Africa by Walter et al.[2000]. As this is the first realization of the Eurasian modeling effort, they have limited themselves to only twelve broad regions. Particular attention has been given to identifying… more
Date: April 3, 2000
Creator: Bhattacharyya, J.; Walter, W. R.; Flanagan, M. P.; O'Boyle, J. & Pasyanos, M. E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
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